CN108234078A - A kind of information coding processing method applied to data radio station - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
- G10L19/12—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0041—Arrangements at the transmitter end
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- Acoustics & Sound (AREA)
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- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
The invention discloses a kind of information coding methods applied to data radio station information transfer channel, it is characterized in that, described information transmission channel includes information receiving channel, data transmission channel, Tone Via channel and information output channel, input terminal of the output terminal of described information receiving channel respectively with the input terminal of data transmission channel and Tone Via channel is connect, output terminal of the input terminal of information output channel respectively with the output terminal of data transmission channel and Tone Via channel is connect, the data transmission channel uses data-encoding scheme, the Tone Via channel uses speech coding method.The present invention is by the way that data encoding and speech coding are individually carried out, and so as to effectively improve the reliability of data transmission and anti-interference, can also reduce the channel width of Speech Communication occupancy.
Description
Technical field
The present invention relates to a kind of information coding methods, and in particular to a kind of information coding processing side applied to data radio station
Method.
Background technology
At present, data radio station refers to the high-performance expert data transmission radio station by DSP technologies and radiotechnics realization.
The use of data radio station adds wireless modem from earliest button code, telegram, analog radio, develops to current digital radio station
With DS P, software radio；Signal is transmitted also from code, low speed data to high-speed data, can be transmitted including remote-control romote-sensing
The business such as data, dynamic image.More well-known data radio station includes the SATEL data radio stations of Finland, the U.S. in the world at present
MDS and Japan day essence etc..
Coding is that word, number or other objects are weaved into number or by information, data conversion with prespecified method
Be information from a kind of form or format conversion it is another form of process into defined electric impulse signal, encodes in electrometer
Calculate it is mechanical, electrical depending on, be remotely controlled and communicate etc. and have extensive use, common coding has two classes, and one kind is binary coding, another
Class is decimal coded.
With the development of data radio station, data radio station will not only meet data-transformation facility, also meet Tone Via work(
Can, but the more demanding reliability of data transmission procedure and antijamming capability, Speech Communication then require channel occupancy bandwidth low,
The unsuitable this data radio station with data-transformation facility and Speech Communication of single encoding scheme.
Invention content
The technical problems to be solved by the invention are to overcome the deficiencies of the prior art and provide a kind of data radio station that is applied to believe
The information coding method of transmission channel is ceased, by the way that data encoding and speech coding are individually carried out, so as to effectively carry
The reliability and anti-interference of high data transmission can also reduce the channel width of Speech Communication occupancy.
The present invention is achieved through the following technical solutions：
A kind of information coding method applied to data radio station information transfer channel, described information transmission channel include information
Receiving channel, data transmission channel, Tone Via channel and information output channel, the output terminal difference of described information receiving channel
Connect with the input terminal of data transmission channel and the input terminal of Tone Via channel, the input terminal of information output channel respectively with number
It is connected according to the output terminal of transmission channel with the output terminal of Tone Via channel, the data transmission channel uses data encoding side
Method, the Tone Via channel use speech coding method.The present invention by the way that data encoding and speech coding are individually carried out, from
And the reliability and anti-interference of data transmission can be effectively improved, it can also reduce the channel width of Speech Communication occupancy.
Further, the data-encoding scheme includes the following steps, step 1：By what is received from information receiving channel
Data are divided into RS encoding blocks；Step 2：RS codings are carried out to RS encoding blocks；Step 3：Data after coding are interleaved；Step
4：Prepare training sequence and header sequence；Step 5：Bit scramble is carried out to data；Step 6：Data after scrambling are modulated.
Further, step 1 includes the following steps, step 101：When the data length received from information receiving channel not
More than 239 bytes mend 0 after data, and then 239 bytes of polishing carry out step 103, received when from information receiving channel
When the data length arrived is more than 239 bytes, step 102 is carried out；Step 102：To data according to 239 one group point of bytes
Group, if last group of data mend 0,239 bytes of polishing less than 239 bytes after last group of data；Step 103：
The picket code of 16 bytes is generated after each group of data." 0 " of addition is not in channel, 16 byte picket codes of generation
It need to be in channel.
Further, the RS codings are using RS256Shortened code RS (78, the 62) systematic code of (255,239), the truncation
Code RS (78,62) systematic code generation multinomial be：Wherein, α is the basic primitive root of GF (256), and 256 is add sieve
The size in watt domain, i are the power of basic primitive root, and primitive polynomial is：P (x)=x8+x7+x2+ x+1 is calculated by primitive polynomial
The field element of GF (256) be：
Further, interweave interleaver of the interleaver used for the forms mode based on byte in step 3, step
3 include the following steps：Step 301：Interleaver generate one often 255 bytes of row, common C rows table, wherein, 10 >=C >=1；Step
Rapid 302：Data after RS is encoded successively are entered the table of interleaver generation according to byte transmission sequence by row write；Step 303：Often go
According to RS256(255,239) complete coding after, by the picket code according to the sequencing of removal be placed on the row the 240th-
255 row.In step 302, the bit7 bits of each byte data are filled out in the position of bit7, and the 1st group of 239 bytes are put into the 1st row,
2nd group of 239 bytes are put into the 2nd row, and so on, the picket code (p1 that the 1st row the 240th arranges in the table of interleaver generation15) be
1st picket code for sending out previous register after the completion of coding.The intertexture example of 2153 bytes is given below：Wherein, m1, m2 ..., m2153 are to be encoded
Data, interleaver read data since arranging the 1st and send scrambler, and " sky " byte is not sent, and bit7 is first sent in byte.Interleaver
Receiving terminal the line number of the interleaver table to be generated and the length of last column are calculated according to the byte of data, then go to hand over
It knits, valid data is taken to be sent to bit scrambler after error correction.
Further, the training sequence described in step 4 includes following sequence：Transmitter power is established and AGC sequences：Institute
It states transmission power and establishes sequence and be made of 199 all zero bits；Synchronous auxiliary sequencel：For signal processing to synchronize, by 16 ratios
Spy's composition；Frame synchronization sequence：It is made of 60 bits；Conveying length sequence：For representing the bit length of data, transmission sequence from
Up to arrive lowest order；Length check sequence：For the verification sequence of conveying length sequence, totally 24 bit, by conveying length sequence
It is encoded using RS (15,9) the shortened code RS (10,4) encoded, is inserted 24 bit check sequences after coding.
Further, the bit scramble described in step 5 uses PN codes, and the proper polynomial of the PN codes is：X15+ X+1, and
The bit scramble uses 15 grades of registers, and the initial value of the register is：1101 0010 1011 001.Register is initial
The leftmost bit of value is placed on the register first order, often handles one, register moves right one, such as the bit scrambler of attached drawing 4
Shown in operating diagram.
Further, the speech coding method includes the following steps, step A：To the simulated voice that receives into jargon
Sound encodes；Step B：Prepare training sequence and header sequence；Step C：Simulated voice after coding is scrambled；Step D：Pair plus
Simulated voice after disturbing is modulated.
Further, the speech coding described in step A is using G.729 scheme, the training sequence described in step B include
Following sequence, transmitter power is established and AGC sequences：The transmission power is established sequence and is made of 199 all zero bits；It is synchronous
Auxiliary sequencel：For signal processing to synchronize, it is made of 16 bits；Frame synchronization sequence：It is made of 60 bits；EOM flag sequences：
It is made of 3 bits, for identifying whether speech terminates, if voice packets, then speech does not terminate, fills out 000, if speech knot
Beam is then filled out 111, and is from left to right transmitted；Conveying length sequence：For representing the bit length of data, transmission sequence from
Up to arrive lowest order；Head verification sequence：To EOM flag sequences and conveying length sequence using block code (25,20), 5 are generated
Bit head error correction sequence, the production formula of the parity check code of the 5 bit head error correction sequence are：[P1 ..., P5]=
[R1 ..., R3, TL1 ..., TL17] HT, wherein, P is Parity Check Bits, and P1 is transmitted first, and R indicates for EOM,
R1 is low level, and TL is transmits length symbol, HTFor the transposition of matrix H, H is parity matrix,
Voice coding
G.729 scheme is to the international standard of the voice signal of the telephone bandwidth coding and H.323 speech coding algorithm of agreement suggestion
One of.The algorithm is used to structure algebras Excited Linear Prediction (CS-ACELP) algorithm.Encoder is first by analog input signal
The filtering of call voice bandwidth is carried out, is then sampled with 8kHz, is then quantified as the linear PCM signal of 16bit.Encoding operation is
Speech frame based on 10ms, every 80 sampling points form a speech frame.Algorithm will be analyzed and carried to each frame voice signal
It takes parameter and is sent to the coding-decoding operation of decoder decoding completion G.729.It has high compression ratio, the higher spy of voice quality
Point, comparison is applicable in communicate with the digital coding of speech.
Compared with prior art, the present invention it has the following advantages and advantages：The present invention is by data encoding and speech
Coding separately carries out, and data transmission is made to have higher reliability and antijamming capability, channel occupancy when also making Speech Communication
Broadband reduces, so as to effectively improve the working efficiency of data radio station and work quality.
Description of the drawings
Attached drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is the structure diagram of the data radio station information transfer channel in the present invention.
Fig. 2 is the data transmission coding protocol procedures figure of the present invention.
Fig. 3 is the Tone Via encoding scheme flow chart of the present invention.
Fig. 4 is the operating diagram of bit scrambler.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment 1
As shown in Figure 1, the present embodiment provides a kind of information coding method applied to data radio station information transfer channel, letter
It ceases transmission channel and includes information receiving channel, data transmission channel, Tone Via channel and information output channel, information receives logical
Input terminal of the output terminal in road respectively with the input terminal of data transmission channel and Tone Via channel is connect, information output channel
Output terminal of the input terminal respectively with the output terminal of data transmission channel and Tone Via channel is connect.
In the present embodiment, data transmission channel uses data-encoding scheme, and Tone Via channel uses speech coding method.
As shown in Fig. 2, data-encoding scheme includes the following steps, step 1：The data that will be received from information receiving channel
It is divided into RS encoding blocks；Step 2：RS codings are carried out to RS encoding blocks；Step 3：Data after coding are interleaved；Step 4：It is accurate
Standby training sequence and header sequence；Step 5：Bit scramble is carried out to data；Step 6：Data after scrambling are modulated.
Step 1 includes the following steps：Step 101：When the data length received from information receiving channel is no more than 239
Byte, mends 0 after data, then 239 bytes of polishing carry out step 103, when the data received from information receiving channel are long
When degree is more than 239 bytes, step 102 is carried out；Step 102：Data are grouped according to 239 one group of bytes, if most
Later group data are less than 239 bytes, then 0 are mended after last group of data, 239 bytes of polishing；Step 103：At each group
The picket code of 16 bytes is generated after data.
RS codings in step 2 are using RS256Shortened code RS (78, the 62) systematic code of (255,239), shortened code RS (78,
62) multinomial of systematic code generation is：Wherein, α is the basic primitive root of GF (256), and 256 be the big of Galois field
Small, i is the power of basic primitive root, and primitive polynomial is：P (x)=x8+x7+x2+ x+1, the GF calculated by primitive polynomial (256)
Field element be：
Interweave interleaver of the interleaver used for the forms mode based on byte in step 3, and step 3 includes following
Step, step 301：Interleaver generate one often 255 bytes of row, common C rows table, wherein, 10 >=C >=1；Step 302：Successively
Data after RS is encoded are entered the table of interleaver generation according to byte transmission sequence by row write；Step 303：Often go according to RS256
(255,239) after completing coding, picket code is placed on to the 240-255th row of the row according to the sequencing of removal.
Training sequence described in step 4 includes following sequence, and transmitter power is established and AGC sequences：Transmission power is built
Vertical sequence is made of 199 all zero bits；Synchronous auxiliary sequencel：For signal processing to synchronize, it is made of 16 bits；Frame synchronization
Sequence：It is made of 60 bits；Conveying length sequence：For representing the bit length of data, transmission sequence is from up to minimum
Position；Length check sequence：For the verification sequence of conveying length sequence, totally 24 bit, RS (15,9) is used by conveying length sequence
The shortened code RS (10,4) of coding is encoded, and inserts 24 bit check sequences after coding.
The bit scramble of step 5 uses PN codes, and the proper polynomial of the PN codes is：X15+ X+1, and bit scramble uses
15 grades of registers, the initial value of register are：1101 0010 1011 001.
Embodiment 2
The present embodiment on the basis of embodiment 1, implement the present embodiment when, as shown in figure 3, speech coding method include with
Lower step, step A：Speech coding is carried out to the simulated voice received；Step B：Prepare training sequence and header sequence；Step C：
Simulated voice after coding is scrambled；Step D：Simulated voice after scrambling is modulated.Speech coding in step A
Using G.729 scheme, the training sequence in step B includes following sequence, and transmitter power is established and AGC sequences：Transmission power
Sequence is established to be made of 199 all zero bits；Synchronous auxiliary sequencel：For signal processing to synchronize, it is made of 16 bits；Frame is same
Step sequence：It is made of 60 bits；EOM flag sequences：It is made of 3 bits, for identifying whether speech terminates, if speech
Packet, then speech does not terminate, fills out 000, if speech terminates, fills out 111, and be from left to right transmitted；Conveying length sequence：With
In the bit length for representing data, transmission sequence is from up to lowest order；Head verification sequence：To EOM flag sequences and transmission
Length sequences use block code (25,20), generate 5 bit head error correction sequences, the parity check code of the 5 bit head error correction sequence
Production formula be：[P1 ..., P5]=[R1 ..., R3, TL1 ..., TL17] HT, wherein, P is odd even school
Bit is tested, P1 is transmitted first, and R indicates for EOM, and R1 is low level, and TL is transmits length symbol, HTFor the transposition of matrix H, H is strange
Even parity check matrix,
Above-described specific embodiment has carried out the purpose of the present invention, technical solution and advantageous effect further
It is described in detail, it should be understood that the foregoing is merely the specific embodiment of the present invention, is not intended to limit the present invention
Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (9)
1. a kind of information coding method applied to data radio station information transfer channel, which is characterized in that described information transmission is logical
Road includes information receiving channel, data transmission channel, Tone Via channel and information output channel, described information receiving channel
Input terminal of the output terminal respectively with the input terminal of data transmission channel and Tone Via channel is connect, the input of information output channel
The output terminal respectively with the output terminal of data transmission channel and Tone Via channel is held to connect, the data transmission channel uses number
According to coding method, the Tone Via channel uses speech coding method.
2. a kind of information coding method applied to data radio station information transfer channel according to claim 1, feature
It is, the data-encoding scheme includes the following steps：
Step 1：The data received from information receiving channel are divided into RS encoding blocks；
Step 2：RS codings are carried out to RS encoding blocks；
Step 3：Data after coding are interleaved；
Step 4：Prepare training sequence and header sequence；
Step 5：Bit scramble is carried out to data；
Step 6：Data after scrambling are modulated.
3. a kind of information coding method applied to data radio station information transfer channel according to claim 2, feature
It is, step 1 includes the following steps：
Step 101：When the data length received from information receiving channel be no more than 239 bytes, 0 is mended after data, polishing
Then 239 bytes carry out step 103, when the data length received from information receiving channel is more than 239 bytes, into
Row step 102；
Step 102：Data are grouped according to 239 one group of bytes, if last group of data are less than 239 bytes,
0 is mended after last group of data, 239 bytes of polishing；
Step 103：The picket code of 16 bytes is generated after each group of data.
4. a kind of information coding method applied to data radio station information transfer channel according to claim 3, feature
It is, the RS codings are using RS256Shortened code RS (78, the 62) systematic code of (255,239), shortened code RS (78, the 62) system
System code generation multinomial be：Wherein, basic primitive roots of the α for GF (256), 256 size for Galois field, i
For the power of basic primitive root, primitive polynomial is：P (x)=x8+x7+x2The domain of+x+1, the GF calculated by primitive polynomial (256)
Element is：
5. a kind of information coding method applied to data radio station information transfer channel according to claim 4, feature
It is, interweave interleaver of the interleaver used for the forms mode based on byte in step 3, and step 3 includes following step
Suddenly：
Step 301：Interleaver generate one often 255 bytes of row, common C rows table, wherein, 10 >=C >=1；
Step 302：Data after RS is encoded successively are entered the table of interleaver generation according to byte transmission sequence by row write；
Step 303：Often go according to RS256(255,239) after completing coding, the picket code is put according to the sequencing of removal
In the 240-255th row of the row.
6. a kind of information coding method applied to data radio station information transfer channel according to claim 5, feature
It is, the training sequence described in step 4 includes following sequence：
Transmitter power is established and AGC sequences：The transmission power is established sequence and is made of 199 all zero bits；
Synchronous auxiliary sequencel：For signal processing to synchronize, it is made of 16 bits；
Frame synchronization sequence：It is made of 60 bits；
Conveying length sequence：For representing the bit length of data, transmission sequence is from up to lowest order；
Length check sequence：For the verification sequence of conveying length sequence, totally 24 bit, RS (15,9) is used by conveying length sequence
The shortened code RS (10,4) of coding is encoded, and inserts 24 bit check sequences after coding.
7. a kind of information coding method applied to data radio station information transfer channel according to claim 6, feature
It is, the bit scramble described in step 5 uses PN codes, and the proper polynomial of the PN codes is：X15+ X+1, and the bit scramble
Using 15 grades of registers, the initial value of the register is：1101 0010 1011 001.
8. a kind of information coding method applied to data radio station information transfer channel according to claim 2, feature
It is, the speech coding method includes the following steps：
Step A：Speech coding is carried out to the simulated voice received；
Step B：Prepare training sequence and header sequence；
Step C：Simulated voice after coding is scrambled；
Step D：Simulated voice after scrambling is modulated.
9. a kind of information coding method applied to data radio station information transfer channel according to claim 8, feature
It is, for the speech coding described in step A using G.729 scheme, the training sequence described in step B includes following sequence：
Transmitter power is established and AGC sequences：The transmission power is established sequence and is made of 199 all zero bits；
Synchronous auxiliary sequencel：For signal processing to synchronize, it is made of 16 bits；
Frame synchronization sequence：It is made of 60 bits；
EOM flag sequences：It is made of 3 bits, for identifying whether speech terminates, if voice packets, then speech does not terminate, fills out
000, if speech terminates, 111 are filled out, and be from left to right transmitted；
Conveying length sequence：For representing the bit length of data, transmission sequence is from up to lowest order；
Head verification sequence：To EOM flag sequences and conveying length sequence using block code (25,20), 5 bit head error correction sequences are generated
Row, the production formula of the parity check code of the 5 bit head error correction sequence are：[P1 ..., P5]=[R1 ..., R3,
TL1 ..., TL17] HT, wherein, P is Parity Check Bits, and P1 is transmitted first, and R indicates for EOM, and R1 is low level, and TL is passes
Send length symbol, HTFor the transposition of matrix H, H is parity matrix,
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